Homework Help: chem

Posted by gabriella on Sunday, January 25, 2009 at 7:59pm.

2) How many moles of nitrogen monoxide will be produced when 80.0 grams of oxygen are used? What volume of ammonia is needed?

this iz the equation
4NH3 + 5O2 -> 6H2O + 4NO

the 1st part i got 4 mol NO and i dont no how to do the 2nd prt

chem - Damon, Sunday, January 25, 2009 at 8:05pm
ok, your equation seems to be balanced
so for every mole of O2 you get (4/5) moles of NO
80 grams O2 / 32 grams/mole = 2.5 moles O2
so
2.5 * 4/5 = 2 moles NO

So we also have 2 moles of NH3
If at standard pressure and temp, 22.4 liters/mole
44.8 liters
chem - Damon, Sunday, January 25, 2009 at 8:08pm
I think maybe you used 16 for O2 but the 16 is just one atomic mass for O in grams The molecular mass is 32 grams/mole
chem - Damon, Sunday, January 25, 2009 at 8:10pm
when they say 80 grams of oxygen I think they mean of the gas O2, not the atom O
chem - gabriella, Sunday, January 25, 2009 at 8:10pm
oh okay
i forgot to make oxygen diatomic and thanks for the second part :)

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